Jaw-crusher.



A. B. BLACK & J. H. MCKEE.

JAW GRUSHER.

APPLICATION FILED rum, 1910.

1,032,808. Patented July 16, 1912.

2 SHEETS-*SHEET 1.

B. BLACK @a J. H. MOKEE.

JAW GRUSHER.

APPLICATION FILED 11213.21, 1910.

1,082,808. Patented Ju1y16,1912.

2 SHEETS-SHEET 2.

MWAQMC/u. Ma. @M l RAMI cn.. WASHINGTON n c ALBERT B. BLACK, OF CONCORD, MASSACHUSETTS, AND JAMES I-I. MCKEE, OF HARVEY,

ILLINOIS, ASSIGNORS TO AUSTIN MANUFACTURING COMPANY, 0F CHICAGO, ILLI- NOIS, A CORPORATION OF ILLINOIS.

JAW-CRUSI-IER.

Specification of Letters Patent.

Patented July 16, 1912.

To all whom 'it may concern:

Be it known that we, ALBERT B. BLACK and JAMES H. MCKEE, citizens of the United States of America, and residents of Concord, Middlesex county, Massachusetts, and Harvey, Cook county, Illinois, respectively, have invented a certain new and useful Improvement in Jaw-Crushers, of which the following is a specification.

Our invention relates to Crushers of that particular kind in which a movable jaw is opposed to a stationary jaw to form a hopper in which the rock or other material may be crushed.

Prior to our invention Crushers of this character have been constructed in such manner that the movable jaw was free to rub against the cheek plates of the hopper. In some cases, in fact, the cheek plates were depended upon to hold the movable jaw against lateral displacement. These construct-ions, in our judgment were all more or less unsatisfactory.

The object of our invention is, therefore, the provision of a bearing which will not only support the movable jaw, and insure the requisite movement thereof, but which will also hold the jaw firmly against either upward or lateral displacement, thus eliminating friction between the jaw and the cheek plates of the hopper, and in various other ways rendering a Crusher of this character more satisfactory than heretofore, as will hereinafter more fully appear.

In the accompanying drawingswFigure l is a vertical longitudinal-section `of a jaw crusher embodying the principles of our invention. Fig. 2 is an enlarged section on line 2 2 in Fig. l. Fig. 3 is a vertical section on line 3 3 in Fig. 2.

As thus illustrated, our invention comprises a movable jaw A disposed opposite a stationary jaw B. The two jaws are disposed between the cheek pla-tes C of the crusher frame. In this way a hopper is formed to receive the rock or other material to be crushed. The aw A is actuated by the pitman D which is fulcrumed on the end of a yoke E that has its other end suitably mounted on the other end of the frame. The said pitman D is actuated by an eccentric F or other means. So far the construction is common and well known. In accordance with our invention, however, the jaw A is supported on a crank shaft G which is mounted at its ends in bearings g on the frame. The said crank shaft does not r0- tate, but simply oscilla-tes back and forth in said bearings during the operation of the jaw. rThis crank shaft preferably consists of a single drop forging having the cylin dric end portions g, the integral crank arms g2, and the long cylindric intermediate portion g3, which latter is the bearingfor the lower end of the jaw A. For this purpose the lower end of said jaw has a removable bearing block a which is heldin place on the bottom of the j aw by bolts or other suitable means. The sides of the aw A are provided with recesses a that receive the crank arms g2, the latter in effect embracing the jaw. Thus the crank arms g2 bear against the sides of the frame and prevent endwise displacement of the crank shaft in the bearings g. Also, the said crank arms prevent lateral shift of the jaw A on the crank shaft. In this way the jaw A is held down and pre vented from rubbing against the cheek plates C. The crank shaft is placed in position by introducing it through one of the openings H in the sides of the frame, and by then securing the bearing blocks 7L in place upon the ends g, shown in Fig. 2. Thus the jaw is removable upwardly without disturbing the crank shaft, and the said shaft is removable as a unit at the bottom of the frame.

One of the advantages of our invention is that with the jaw A thus held down the toggle joint J between the jaw and the pitman D can be lower down and more in linel with the back pressure of the rock or stone on the movable jaw than heretofore.

The crank shaft G is set atv the desired angle, as shown, and serves to insure the correct movement for the jaw A. The sides I of the'frame embrace the crank shaft to prevent endwise displacement thereof. The crank shaft in turn embraces the jaw A to prevent lateral displacement of the latter.

The crank shaft, of course, turns or oscillates in the bearing on the lower end of the movable jaw A, and for this purpose the said bearing is preferably lined with Babbitt metal or other material a2, and suitable provision will also be made for oiling or lubricating this bearing, as well as the bear-4 ings for the ends of the crank shaft. With this arrangement the crank shaft serves as an eccentric device for supporting and c ontrolling the lower end of the jaw. This, of course, insures a powerful crushing action.

That we claim as our invention is:

1. In a crusher, a movable jaw, means for moving' the jaw back and forth, a stationary jaw opposed to said movable jaw, a frame with cheek plates at each side of said jaws, and means for holding the movable jaw down, including a rigid crank shaft supporting and embracing the lower end of said movable jaw, within the frame, havinCr means for preventing lateral displacement of said movable jaw, the said frame having an opening to permit the introduction of said crank shaft, and means on said frame in which the ends of said crank shaft oscillate, adapted to prevent endwise displacement of the latter, and whereby the entire crank shaft is removable as one piece at the bottom of the frame, without lifting out the movable jaw.

2. In a crusher, a movable jaw, means for moving the jaw back and forth, a stationary jaw opposed to said movable j aw, a frame with cheek plates at each side of said jaws, and means for holding the movable jaw down, including a crank shaft supporting the lower end of said movable jaw, said crank shaft consisting of a single drop forging having integral crank arms, said arms embracing the lower end of the movable jaw, to prevent lateral displacement of the movable jaw, the said movable having recesses in which the said crank arms work, the said frame having an opening to permit the introduction of said crank shaft, and means on said frame in which the ends of said crank shaft oscillate, adapted to prevent endwise displacement of the latter, and whereby the entire crank shaft is removable as one piece at the bottom of the frame, without lifting out the movable j aw.

3. In a crusher, a movable j aw, means for moving the jaw back and forth, a stationary jaw opposed to said movable jaw, a frame with cheek plates at each side of said jaws, and means for holding the movable jaw down, including a crank shaft supporting and embracing the lower end of said movable jaw, having means for preventing lateral displacement of said movable jaw, said frame having side openings to permit the introduction of said crank shaft, removable bearing blocks for the crank shaft on the frame, a removable bearing block for the.

crank shaft on the bottom of said movable jaw, whereby the movable jaw is removable upward without removing the crank shaft, and means on said frame in which the ends of said crank shaft oscillate, adaptedrto prevent endwise displacement of the latter, and whereby the entire crank shaft is removable as one piece at `the bottom of the frame, without lifting out the movable jaw.

4. In a crusher, a frame, a vibratory jaw, means for holding the jaw down, said means including a crank shaft for the lower end of said jaw, said crank shaft being supported and formedto hold the jaw down and against lateral movement, and the movable jaw being removable upward from the frame without removing the crank shaft.

5. In a crusher, a movable jaw, a frame inclosing the jaw, means for holding the jaw down, said means including a movable bearing adapted and applied for supporting the jaw and holding the same against lateral movement, and a toggle connection for operating said jaw, said bearing being removable as one piece at the bottom of the frame, without lifting the movable jaw, and the movable jaw being removable without disturbing the bearing.

6. In a crusher, a movable aw, means for holding the jaw down, said means including an oscillating crank shaft which embraces and turns in the lower end of said jaw, and a .toggle connection for operating said jaw, said connection comprising an arm rigid with said jaw, the axis of the shaft being below the axis of the movable jaw, and also below the axisof the toggle.

7. In a crusher, the combination of a movable jaw, an eccentric device for operating said jaw, means for holding the jaw down, said means including a crank shaft for supporting the lower end of said jaw, said crank shaft being mounted to turn in a bearing on vthe jaw, a frame inclosing said crank shaft, provided with bearings in which the ends of said shaft oscillate, the crank arms being disposed between the frame and jaw, and a toggle connection between said jaw and said eccentric device, said connection comprising an arm rigid with said jaw, the axis ofthe shaft being below the axis of the movable jaw, and also below the axis of the toggle.

Signed by us at Chicago, Illinois, this 17 th day of February,'l9l0.

ALBERT B. BLACK. JAMES H. MGKEE. lVitnesses:

IVM. B. DURNION, J. NORBY.

Copies of this patent may be obtained for iive cents each, by addressing the Commissioner ofjatents, Washington, D. C. 

